The Triwizard Tournament's third task is to negotiate a corridor of many segments, and reach the other end. The corridor is N segments long. The ith segment is either empty or has a dragon. Harry cannot pass the dragon and will have no option but to…
题目 Source http://www.spoj.com/problems/DQUERY/en/ Description Given a sequence of n numbers a1, a2, ..., an and a number of d-queries. A d-query is a pair (i, j) (1 ≤ i ≤ j ≤ n). For each d-query (i, j), you have to return the number of distinct elem…
SPOJ - GSS3 Can you answer these queries III Description You are given a sequence A of N (N <= 50000) integers between -10000 and 10000. On this sequence you have to apply M (M <= 50000) operations: modify the i-th element in the sequence or for giv…
http://www.spoj.com/problems/SUBLEX/ 好难啊. 建出后缀自动机,然后在后缀自动机的每个状态上记录通过这个状态能走到的不同子串的数量.该状态能走到的所有状态的f值的和+1就是当前状态的f值. 最后对于询问的k,从root开始走顺便加加减减就可以了. #include<cstdio> #include<cstring> #include<algorithm> using namespace std; int in() { int k =…
Time Limit: 1000MS Memory Limit: 1572864KB 64bit IO Format: %lld & %llu Description Being a completist and a simplist, kid Yang Zhe cannot solve but get Wrong Answer from most of the OI problems. And he refuse to write two program of same kind at…
题目 Source http://www.spoj.com/problems/TSUM/ Description You're given a sequence s of N distinct integers.Consider all the possible sums of three integers from the sequence at three different indicies.For each obtainable sum output the number of diff…
COT - Count on a tree #tree You are given a tree with N nodes.The tree nodes are numbered from 1 to N.Each node has an integer weight. We will ask you to perform the following operation: u v k : ask for the kth minimum weight on the path from node u …
Query on a tree Time Limit: 5000ms Memory Limit: 262144KB This problem will be judged on SPOJ. Original ID: QTREE64-bit integer IO format: %lld Java class name: Main Prev Submit Status Statistics Discuss Next Font Size: + - Type: None Graph…
http://www.spoj.com/problems/DISUBSTR/ 题意:求字符串不同子串的数目. #include <bits/stdc++.h> using namespace std; const int N=1005; void sort(int *x, int *y, int *sa, int n, int m) { static int c[N], i; for(i=0; i<m; ++i) c[i]=0; for(i=0; i<n; ++i) ++c[x[y…
DQUERY - D-query #sorting #tree English Vietnamese Given a sequence of n numbers a1, a2, ..., an and a number of d-queries. A d-query is a pair (i, j) (1 ≤ i ≤ j ≤ n). For each d-query (i, j), you have to return the number of distinct elements in the…
题目链接:http://www.spoj.com/problems/COT3/ Alice and Bob are playing a game on a tree of n nodes.Each node is either black or white initially. They take turns to do the following operation:Choose a white node v from the current tree;Color all white node…
题目链接:http://www.spoj.com/problems/COT2/ You are given a tree with N nodes.The tree nodes are numbered from 1 to N.Each node has an integer weight. We will ask you to perfrom the following operation: u v : ask for how many different integers that repr…
SPOJ Problem Set (classical) 7001. Visible Lattice Points Problem code: VLATTICE Consider a N*N*N lattice. One corner is at (0,0,0) and the opposite one is at (N,N,N). How many lattice points are visible from corner at (0,0,0) ? A point X is visible…
Coding a Dijkstra is not hard. %70 of my time spent on tackling TLE, as my last post. Dijkstra works in BFS manner, but at each step, it picks the shortest child greedily and then relax all other neighbors. Data Structure: since there could be up to…
Just CS rookie practice on DFS\BFS. But details should be taken care of: 1. Ruby implementation got TLE so I switched to C++ 2. There's one space after each output node, including the last one. But SPOJ doesn't clarify it clearly. #include <iostream>…
